Optimized iterative MAP ARQ for OFDM over rapidly-varying frequency-selective channels

被引:0
|
作者
Ketseoglou, Thomas [1 ]
机构
[1] Calif State Polytech Univ Pomona, Pomona, CA 91768 USA
来源
2007 WIRELESS TELECOMMUNICATIONS SYMPOSIUM | 2007年
关键词
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper we propose an optimized OFDM iterative ARQ receiver suitable for application in rapidly varying multipath channels. The receiver is an optimized MAP Turbo processor that exploits log likelihood ratio (LLR) information from previously failed transmissions. We show that this configuration achieves very high gains compared to a standard ARQ system by virtue of two co-operative mechanisms: First, by using (log likelihood ratios) LLR from previous decoding trials to improving the expectation maximization (EM) based algorithm channel tracking and LLR calculation during retransmissions and second by combining together the extrinsic detector LLR from previous reception attempts with the newly generated one from the retransmissions of a previously failed packet.
引用
收藏
页码:315 / 320
页数:6
相关论文
共 50 条
  • [11] Iterative frequency domain equalization for OFDM over doubly selective channels
    Yu, Yao
    Leung, Shu-Hung
    Lu, Fei
    2007 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOL III, PTS 1-3, PROCEEDINGS, 2007, : 453 - +
  • [12] Channel Prediction for Millimeter Wave MIMO-OFDM Communication in Rapidly Time-Varying Frequency-Selective Fading Channels
    Lv, Changwei
    Lin, Jia-Chin
    Yang, Zhaocheng
    IEEE ACCESS, 2019, 7 : 15183 - 15195
  • [13] Power loading for CP-OFDM over frequency-selective fading channels
    Wang, N
    Blostein, SD
    GLOBECOM'03: IEEE GLOBAL TELECOMMUNICATIONS CONFERENCE, VOLS 1-7, 2003, : 2305 - 2309
  • [14] OFDM channel estimation Algorithm based on Frequency-Selective and Time-Varying Channels
    Tang Yan-bo
    Ge Wan-cheng
    2008 IEEE INTERNATIONAL SYMPOSIUM ON KNOWLEDGE ACQUISITION AND MODELING WORKSHOP PROCEEDINGS, VOLS 1 AND 2, 2008, : 204 - +
  • [15] A Novel PRCC Scheme for OFDM Systems Over Frequency-Selective Fading Channels
    Ma, Tian-Ming
    IEEE SIGNAL PROCESSING LETTERS, 2017, 24 (05) : 634 - 637
  • [16] A new modulation method for OFDM systems over frequency-selective fading channels
    Ma, Tianming
    Zhang, Sheng
    Yuan, Xiaobing
    Journal of Computational Information Systems, 2014, 10 (12): : 5033 - 5040
  • [17] A minimax optimal decoder for OFDM over unknown frequency-selective fading channels
    Shayevitz, O
    Feder, M
    2005 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH, AND SIGNAL PROCESSING, VOLS 1-5: SPEECH PROCESSING, 2005, : 869 - 872
  • [18] Adaptive Zero-Padding OFDM over Frequency-Selective Multipath Channels
    Neng Wang
    Steven D. Blostein
    EURASIP Journal on Advances in Signal Processing, 2004
  • [19] Adaptive zero-padding OFDM over frequency-selective multipath channels
    Wang, N
    Blostein, SD
    EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING, 2004, 2004 (10) : 1478 - 1488
  • [20] Spectral spatial equalization for OFDM in time-varying frequency-selective multipath channels
    Sung, SH
    Brady, D
    SAM 2000: PROCEEDINGS OF THE 2000 IEEE SENSOR ARRAY AND MULTICHANNEL SIGNAL PROCESSING WORKSHOP, 2000, : 434 - 438